<!DOCTYPE html>
<html lang="en" style="font-size: 100px;">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            width: 1rem;
            height: 1rem;
            background-color: green;
        }
    </style>
</head>
<body>
    
    <div>
        
    </div>

</body>
</html>